• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.650-652
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• 2013

As VANET(Vehicular Ad-hoc NETwork) improves road safety, efficiency, and comfort, and provides a value-added service such as commerce information or internet access. it is the most important technology in ITS(Intelligent Transportation System). But, In VANETs, better communication efficiency can be achieved by sacrificing security and vice versa. VANETs cannot get started without either of them. Therefore, to solve these problems simultaneously, this paper proposes MAC(Message Authentication Code) based SDAP(Secure Data Aggregation Protocol) which removes redundant data or abnormal data between vehicles and verifies the integrity of message. The MAC based SDAP not only improves the efficiency of data delivery but also enhances the security by detecting malicious attacks such as propagation jamming attack, forgery attack, and disguised attack.

• Asian-Australasian Journal of Animal Sciences
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• v.23 no.1
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• pp.131-148
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• 2010

Piglet health at weaning is compromised due to several stress factors. Following the ban of antibiotic growth promoters new alternatives are required to control these problems. This paper reviews the evidence available for the use of spray dried animal plasma (SDAP) as an alternative to antibiotics in weaning pigs. Data from 75 trials in 43 publications involving over 12,000 piglets (mean values) have been used to calculate the performance responses of piglets according to several factors including SDAP origin, protein source from the control diet being replaced, dose of inclusion, age and weight of the piglets at weaning, sanitary conditions and simultaneous use or not of medication. Although the use of SDAP of all origins results in positive responses, it appears that plasma from porcine origin has the highest efficacy. This could be explained by the specificity of its IgG against porcine pathogens. During the first week post-weaning the response to plasma appears to increase with the inclusion dose, although over the two-week pre-starter period an optimal inclusion level of 4-8% is suggested. SDAP improves feed efficiency more markedly when the piglets are challenged with an experimental infection or when feed does not contain medication, which could be indicative of a lower expenditure of energy and nutrients to build an immune response against the challenge. There is evidence supporting that SDAP IgG and other bioactive substances therein prevent the binding of pathogens to the gut wall and reduce the incidence of diarrhoea in the post-weaning phase. Overall, plasma can be postulated as an excellent alternative to in-feed antimicrobials for piglets in the post-weaning phase.

• Journal of the Korea Convergence Society
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• v.9 no.6
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• pp.241-250
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• 2018

The purpose of this study was to determine factors affecting the suicidal ideation in spouse caregivers of the elderly with dementia Living in the Community. The data were collected from 160 spouses of elderly people with dementia who use dementia support centers and long-term care service in seoul. Data were collected with structured questionnaires to investigate the general characteristics and suicidal ideation-related factors, and analyzed using t-test, ANOVA, Pearson's correlation coefficient, Multiple regression analysis with SPSS win version 24.0 program. The significant factors affecting suicidal ideation were entrapment(${\beta}=.452$), SDAP(${\beta}=.273$), coping strategies(${\beta}=-.199$), it were explained 55.7%(F=19.199, p<.001). Therefore, counseling and education should be provided to help reduce the entrapment and enhance coping strategy with the dementia condition of the elderly with dementia. Measures also need to be made to improve the accessibility of a spouse with dementia that are left neglected.